Automobile heating apparatus



20, 1940. w. H. KUEHN 1 AUTOMOBILE HEATING APPARATUS Filed June 27, 1938 2 Sheets-Sheet 1 Inventor 9, 3940 w. H. KUEHN AUTQMOBILE HEATJIZNG APPARATUS Filed-June 27, 1938 2 Sheets-Shget 2 Attorneys Patented Aug. '20, 1940 NIT My invention relates to heating apparatus forautomobiles, for use in preheatingv the engine and also to heat theinterior of the car.

The invention is designed as an improvement 5 over the apparatus disclosed in my U. S. Letters Patent No. 2,121, 90, dated June 21, 1938, the

improvements being directed particularly toward providing a more practical and structurally simplified and efiicient heating apparatus than that 10 disclosed in said patent and which is adapted to preheat the-lubricating oil in the crank-case without overheating the same. V

The precise nature of my improvement, to-

gather with the advantages thereof, will be read- 15 ily understood when the succeeding description and appended claim are read with reference to the drawings accompanying and forming part of this specification.

In said drawings: 20 Figure 1 is a fragmentary view partly in 1011- gi tudinal section and partly in side elevation of an automobileequipped with my improved appa- 1 30 on the line 4-4 of Figure 2 and drawn toan enlarged scale. 1 Referring to the drawings by numerals, the apparatus of the instant invention has been shown applied to a conventionally illustrated au- 35 tomobile, l designating the body, 2 the engine, 3 the water pump, and 4. the oil pump in the crank-case 5. In the type of engine illustrated the water cooling system has a lower discharge tap 6 and an upper inlet tap i uponopposite sides 40 of the water pump 3 respectively, which are utilized in the present instance as presently described. The automobile is shown as, equipped withv a usual type of car heater 8 attached to the dash-board by upper and lower outlet and in-- 45 let taps 9 and i0 respectively.

My improved apparatus embodies asits basic element, and in common with the apparatus of my before mentioned patent, a heat conducting conduit ll disposed substantially horizontally 50 alongside the lower part of the engine 2 and having the form of a cylinder open at its front and rear ends, a burner I2 in the rear of said conduit for introducing ,heat into the rear 'end thereofla water jacket l3 in the 'conduit for 5 preheating water from the cool n ystem of the conduit to provide a combustion chamber 34 in engine, and an oil heating drum l4 surrounding the conduitv H and connected in the oil circulating system of the engine. These elements, however, differ from the corresponding elements 0 said patent in the following respects. 5

The heating jacket [3 comprises a shell l5 having the cross-sectional form of a six-pointed star and fitting into the conduit I l. The front and rear ends of the shell [5 are closed by castings i6 and Il corresponding in shape to the cross- 10 sectional shape of the shell and fitting into said ends of the latter, respectively, to .which they are connected in any suitable manner. 'The rear casting I! has a central axial bore [8 therein communicating with they interior of the shell 15 and closed at its outer end by a screw plug I9 threaded into. the rear thereof, said plug being provided for clean out purposes. An inlet pipe line for the jacket I3 is connected at one end to the before-mentioned discharge tap 6 of the 20 cooling system by a coupling 3|, said line extending downwardly from said coupling and then rearwardly beneath the drum H with its other 'end bent upwardly and extended through the conduit H and rear casting ll into communication with the interior of'said jacket. The rearwardly extending part 22 of the pipe line 20 ex-' 'tends through a coupling sleeve 23 by means of which and clamps 24 surrounding said coupling atthe opposite ends thereof, said part of the' pipe lineis bolted, as'at 25, to the engine 2. The downwardly extending part 26 of the pipe line 20 has extending laterally therefrom a lower branch line 21 suitably secured to the discharge tap l0 of the heater 8. .The front casting ldhasextending centrally therefrom'a discharge nipple 28 suitably coupled as at 29 to'ari upwardly extending discharge line 30 connected at its upper end, as by the coupling 3|, to'the before mentioned inlet tap l. A laterally extending branch line 32 connects the discharge line 30 to the inlet tap 9 of the heater 8. A control valve 33 "at the juncture of the pipelines 3B and 32 controls the flow I of.water to the heater 8. Thepipe lines 32 and V 21, as will be understood, are for the purpose I =concerned'with the heater 8-.said pipe lines 32 and 21, togetherwith the circulation controlling valve 33, need merely be'identified in passing. 5

As-indicated in my aforesaid patent, the water heating'jacket I3 is shorter than the conduit II' and located forwardly of the rear end of said the rear end of the latter.

2,211,831 The burner I: which is designed-tor gasoline fuel comprises the nozzle 35 projecting slightly into the combustion chamber 34 and with which is associated with the usual control valve 36, a preheating jet 3! and a valve f8 controlling said jet.

A bracket}! mounts the biu'ner n. on' the inlet pipe line 20. Fuel is supplied to the burner l2,

under pressure, from a supply tank 38 secured to the dash-board by suitableclips 40. A fuel feed line 50 extends'from the tank 35 to'the burner i2. The numeral 54 designates a pressure line extending from said tank 39 to the jet 3'I and which need merely be identified in pass- The oil heating cylinder l4 comprises an axial open-ended sleeveill surrounding the conduit il in concentric spaced apart relation thereto and fixed in such relation by means of bolts 6| extending therethrough and through the conduit'l linto bosses 62 provided on the castings l6 and l'l. As shown best in Figure'3, the drum i4 is preferably somewhat elliptical and ,is' disposed with itslon'ger axis upright so that it will fit flat close against the engine 2 and provide for a maximum 1 drum M into the crankcase 5 with a control valve 10 interposed therein at any suitable int.

As best shown in Figure 1, the cond t H, wa-

ter heating jacket [3, drums, and burner .I2L incline downwardly and. rearwardly to-promote' 'fastercirculation or water and oil'through the apparatus and to align the nozzle 35jof the burner with the conduit -Ii.

Referring to the operation, water from the cooling system of the engine is caused to circulate through the heatingjacket l3 byway of the inlet line 20 and out of said jacket back into the cooling system by way of the discharge line 30 as a result of the water being heated insaid' jacket and thus creating substantially a syphoning action as will be understood. The fuel-is fed to the burner l2 and burned under forced draft, as will'be cleanto accelerate the pas age of heated=air irom'the combustion chamber 34 past the water heating jacket l3 and outqf the front end of the conduit ll. Any amount of water desired may thus be heatedin the; apparatus,- said heated water rising through the discharge line 30 and creating-a siphoning action in the cooling system, thereby returning said to said system: The beiore mentioned valve'flis adapted to open and close the line 30- so [that when it is desired to warm up the engine said valve is set to opening position and the apparatus operated to warm'up the water in the heating jacket 13 with the result previously described.

If it is-desired to further warmupthe engine the oil in the crankcase is warmed; Aswillxbe seen from the foregoing, the oil pump 4 'Iunc- I tions to fill thedrum l4,"the overflow draining: back into the crank case by way of the fitting ii i and overflow line 61, this conditionobtaiiiing oi,

course,,only whenthe valve "is closed. By close ing said valve the oil circulates through the drum '14 so thatfsaid drum-under ordinary conditions is always full. The oil in the drum l4 may be subjected'to'the action of heat, as long as is desired, emanating from the conduit l3 and when'itjudged to 'be sufliciently warm, discharged b it into the crankcase by way of the valve I. In this corinection it is to be noted that the spacing between the conduit! I and sleeve prevents over- ,heating of the'oil in said drum l4. I v

The foregoing will, it is believed, suflice to impart a clear understanding or my invention without further explanation.

Manifestly the invention, as described,' is sus- 'ceptible of modification without departing: from the inventive concept and right isherein reserved to such modifications a's fall-withinthe scope of the subjoined claim.

What I claimis:

Heating apparatus for use in connection with the water cooling and lubricating systems oi'an automobile engine and the lubricating pump and comprising a heating cylinder for location alongside the engine and having inlet andoutlet ends, respectively, inlet and outlet pipe lines extending from said ends, respectively," for connection in said cooling system to provide for circulation of water through the cylinder, means for heating said cylinder at will, a drum surroundingsaid.

cylinder and having inlet andvoutlet pipe lines extending therefrom for connection to said pump and to the crank case of the engine, respectively, to provide for circulation of lubricating fluids irom the engine through said drum, an overflow pipe line extending from the top of theidrum for connection to the crank casing of tlie engine, and avalve in'the outlet pipe line 01' said drum -Ior closing the same'at will, said drum being spaced from said heating cylinder to providean- .air cooling open chamber betweensaid drum and cylinder drum.

w nrron 11. men.

preventing overheating of the oil in said ,55 

